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Method for the processing of medical ultrasound images of bony structures, and method and device for computer-assisted surgery
| Details |
Inventors: Lelong, Pierre;
Assignee: U.S. Philips Corporation (New York, NY)
Primary Examiner: Lateef; Marvin M.
Assistant Examiner: Patel; Maulin
Attorney, Agent or Firm: Vodopia; John F.
The image processing method according to the invention includes a step for the acquisition, by means of an ultrasound transducer, of a digitized echographic image of a structure which is substantially not transparent to the ultrasound waves, and a step for the extraction of contour points of said structure. In order to automate the extraction of points, the method includes sub-steps for the detection, in the columns of points of the digitized echographic image, of points which locally have a maximum intensity along each column, for the chaining of points detected from one column to another in a predetermined vicinity, and for selecting chains in the digitized echographic image by determining the chain nearest to the ultrasound transducer as being the contour of said structure. The device according to the invention carries out a method for the simultaneous representation, during the operation, of a high-resolution pre-surgery image and virtual operating tools which are superinposed in this image, together with their current location and orientation as determined in a marking system as a result of the processing of the echographic image. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The invention relates to a process for the processing of ultrasound images.
The invention also relates to a method for assisted surgery which includes steps of such a process.
The invention, moreover, relates to a device for computer-assisted surgery which is intended for use in the field of bone surgery and includes means for carrying out said method.
As is illustrated by the functional blocks in FIG.
5, the device for computer-assisted surgery includes means for providing an exact location and orientation of surgical tools 65, used during a surgical operation, with respect to a bony structure 100 which is situated in an operative field 40, and for visualizing said surgical tools with their exact location and orientation in a three-dimensional high-definition image corresponding to the operating field.
The device notably includes means for the acquisition of medical image data which are connected to a processor which executes the steps of method for assisted surgery and a system for the display of medical images which is connected to the processor.
The image data acquisition means include at least means 61 for the acquisition of a high-definition pre-surgery image CT of a bony structure to be operated, and means 60, 62 for the acquisition of an intra-surgical ultrasound image US of a zone of the same bony structure 100 to be operated.
The acquisition of the high definition three-dimensional pre-surgery image CT of the bony structure to be operated can be realized notably by means of a magnetic resonance imaging apparatus 61 or a digital tomography apparatus 61 based on X-ray images.
The acquisition of the ultrasound image US can be performed by means of an ultrasound transducer which may be a standard probe 60 which is coupled to an echograph 62.
The device for assisted surgery also includes display means 64, for example a screen, for the visualization of the tools in the high-definition image.
This device may also include recording means
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